From the databaseWhat the row says.
Every entry follows the same shape: what is happening, the mechanism, and the recommendation.
Scope
Supplement × Supplement
Last verified
June 4, 2026
SynergyModerate evidence
What is happening. L. plantarum 299v may improve absorption of non-heme iron from some fortified foods.
Mechanism. Strain may alter the meal matrix and gut environment to improve fractional iron absorption.
Recommendation. Can be taken with iron-containing meals, but continue appropriate iron monitoring if deficient.
Stack Score
How it moves the number.
Effect on the composite score
If both Iron and Lactobacillus plantarum 299v are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).
The full algorithm, the clamping rules, and four worked stacks are at /methodology/stack-score.
SourcesSources, by evidence tier.
Every claim on this page is cited. PMIDs link straight to PubMed.
Reference material
1- 1Hoppe M et al. L. plantarum 299v increases iron absorption. British Journal of Nutrition. 2015.Needs sourceNo link